If you would like to update your email address or if you're unsure of the email address you used to create your account, you can do so in the Edit Your Profile area of the Welcome menu. (You must be logged in to access this option.)

Then go to the profile section.

Replace the existing email address with your new one and reenter the new address to confirm the change. If you'd like, you can also update your username from the same screen.

Make sure you select the Save Changes button to confirm the change.